Fix the search bug

[yhbyun]

If I search the tricks by test term, the following SQL is executed.

select count(*) as aggregate from `tricks` where `title` LIKE '%test%' or `description` LIKE '%test%' or
 (select count(*) from `tags` inner join `tag_trick` on `tags`.`id` = `tag_trick`.`tag_id` 
  where `tag_trick`.`trick_id` = `tricks`.`id` and `name` LIKE '%test%' or `slug` LIKE '%test%') >= 1 or 
 (select count(*) from `categories` inner join `category_trick` on `categories`.`id` = `category_trick`.`category_id` 
  where `category_trick`.`trick_id` = `tricks`.`id` and `name` LIKE '%test%' or `slug` LIKE '%test%') >= 1

Two parts of that SQL causes irrelevant result to the search term.

and `name` LIKE '%test%' or `slug` LIKE '%test%'
.
.
.
and `name` LIKE '%test%' or `slug` LIKE '%test%

I think that title only would be sufficient for search and in order to fix the above bug, I modified the code.

[msurguy]

@yhbyun thanks for the PR! Is there an example on the website where it would return an incorrect result set? Thanks very much for trying to explain the issue!

[yhbyun]

@msurguy
http://laravel-tricks.com/search?q=eloquent

When I search with 'eloquent', many irrelevant result are returned, such as

• http://laravel-tricks.com/tricks/phpunit-file-upload-form
• http://laravel-tricks.com/tricks/better-performance-than-route-cache
• http://laravel-tricks.com/tricks/thit
  ...

[msurguy]

Thanks! I've merged the PR and will try to update the site soon!